Type-writing machine.



J. 0. MOLAUGHLIN;

TYPE WRITING MACHINE.

APPLICATION FILED MAY 5, 1908.

927,425, V Patented July 6, 1909.

lay/ 288388 I I 16 a an):

. UNITED STATES PATENT OFFICE.

JOHN G. MCLAUGHLIN, OF JERS EY CITY, NEW

JERSEY, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE Specification of Letters Patent.

Patented July 6, 1909.

Application filed May 5, 1908. Serial No. 430,920.

To all whom it may concern:

Be it known that I, Jone O. McLAUonLIN, a citizen of the United States, residing in J or soy City, in the county of Hudson and State of N e r; J ersey, have invented certain new and useful Improvements in Tvpel Vriting Man l P chines, of which the following 18 a spcc1hcafreely.

' cured upon the track, to permit leveling In carrying out the invention, 1 provide upo r the machine frame a pair of reds having opposite grooves, and I secure to the arriage a truck which is confined between the rails and provided with complcnicntary grooves. The grooves are so shaped and placed to form races which are rectangular in crosssect1on; and in these races I place rollers, in pairs, two pairs in each race, one pair at each. end of the truck, the rollers in each pairoeing set with their axes at right angles, whereby freedom of movement arnfl rigidity of the carriage against vibration are assured. The adjustable rail is set by means of holding screws and set screws, so as to get a close fit of the races to the rollers. I en1 ploy a channel member, one side or wall of WlilCl'l has a groove and constitutes one of the rails, while the other wall contains the screws to adjust and secure the other rail; said channel member being removably scoured to the framework for convenience in substituting a short rail and carria e for a long one, and vice versa. The rol ers are provided with a spacing-fra111e of novel construction. The carriage is adjustably seof the platen to secure accuracy of printing.

Other features and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a plan and Fig. 2 i rings and its guiding means, embodying one form of my invention. Fig. 3 is a diagrammatic end elevation of the same. Fig. 4 is a lan and Fig. 5 an elevation of a ball-spacer.

Pig. 6 is a part-sectional end elevation of the carriage truck and rails.

a rear elevation of a can.

Type bars 1 strike upon the front side of a platen 2 mounted upon a platen frame 3, which is suitably mounted upon a CitIIlfiWG 4 having a front wheel 5 to run upon a tracli 6, r

and at its rear end secured to a truck 7, which is confined between a fixed rail 8 and an adjustable rail 9. i In the side edges of the truck are formed grooves 10, 11, and in the rails are formed complementary grooves 12, 13, said grooves so shaped and disposed as to form raceways which are square in cross-sew tion. In these raceways run roll tirs 14, said rollers disposed in pairs, two pairs in each raceway, one pair at each end of the truck,.

the rollers in' each pair being disposed with then axes at right angles, as seen at Fig. 2, whereby great ease and accuracy of movement of the carriage is secured, and rapidwearing away of theparts is avoided.

The rail 8 constitutes one wall of a channel member, the bottom of which 15 is feinovably secured by screws 16 to the framework 17 of a typewriting machine. In the opposite wall 18 of the channel member are placed headed screws 19, which are threaded 1nto the track or track bar 9 and associated witheach of said screws is one or more set screws 20. The headed screws and the set screws are placed in groups at intervals along the wall 18 to adjust the parts of the track 9 and secure an accurate it of the roovcs to the balls or rollers at all points. TVear may be taken up at any point by loosening the screw or screws 19, and setting up the screwor screwsQO to take up the play, and then the screws 19 may be again turned up. The. rail 9 is adjustable upon a seat 18 formed at the base of the wall 18 within the channel member.

Each .of the grooves is formed at its apex with a recess or clearance 21 for the edges of the rollers; and the latter are controlled or spaced by a spacer which comprises a sheetmetal bar 22 extending along beneath the pivoted a pinion 27, the latter running in mesh with a rack 28 lifted upon the truck, and a rack 29 fixed upon the top of the rail 8.

The rear bar 30 of the carriage frame is socured by means of headed screws 31 upon blocks 32, which are removably attached by screws 33 to the top of the track 7. Grouped with each screw 31 are two set screws 34, whereby either end of the carriage frame may be-raised to level the platen 2; the screw 31 being then tightened to hold the carriage where it is adjusted. The blocks 32 hold the carriage bar 30 above the pinion car 26 of the ball-spaoer.' I

Having thus described my invention, 1 claim:

1 In a typewriting machine, the combination'with a fixed rail and an adjustable rail mounted upon the framework of the machine and having opposite grooves, of a car riage having on one side a truck provided upon its opposite edges with grooves to match the rail grooves, rollers in the grooves; the fixed rail forming part of a channel member in which the adjustable rail is confined, said channel member also containing said truck and having at intervals groups of screws to adjust and secure the adjustable rail, and. a rail to support the opposite side of said carriage.

2. in a typewriting machine, the combination with a lixcd rail and an adjustable rail mounted upon the i'ranuaworli oi the machine and having opposite grooves, of a carriage having a truck provided upon its opposite edges with grooves to match the rail grooves, rollers in the grooves, the fixed rail forming part of a channel member in which the adjustable rail is confined, said channel member also containing said truck and having at intervals groups of screws to adjust and secure the adjustable rail, and provided with a seat upon which the adjustable rail is movable, and a rail to support the opposite side of said carriage.

3. In a typewriting machine, the combination with a fixed rail and an adjustable rail mounted upon the framework of the machine and having opposite grooves, of a car-.

riage having a truck provided upon its opposite edges with groovesto match the rail grooves, and rollers in the grooves; the fixed rail forming part of a channel member in which the adjustable rail is confined, said channel member also containing said truck and having at intervals groups of screws to adjust and secure the adjustable rail, screws detachably securing the base of said channel member to the framework of the machine, and a rail to support the opposite side of said carriage. v

4. In a typewriting machine, the combination with rails mounted upon the framework and having op osite grooves, of a car riaee having a trucliconfined between the rails and having complementary grooves, rollers running in the grooves, and a spacer for said rollers in the form oi a bar extending along the truck and bent up at each of its ends to form roller-engaging ears inserted between the truck and the rails; said bar having between its ends a plate extending up between the truck and one of the rails and bent over the truck to form an ear in which is mounted. a pinion, and racks to engage said pinion, one rack stationary and the other upon the truck.

5. In a typewriting machine, the combination with a pair o'l rails having opposite V- grooves, of a carriage truck between said rails and having' complementary \I-grooves, said grooves formed to make race-ways of square contour in cross-section, and four pairs of rollers running in the race-ways, two pairs upon each side of thetruck, one pair at each end thereof, the rollers in each pair being arranged ith their axes at right angles to each other, and a spacer for said rollers, said spacer comprising a bar extending along the truck and having at its ends ears bent up and formed into cages or racks having openinns within which the rollers are confined.

(5. In a typewritinp machine, the combination with a pair of grooved rails, a truck confined between the rails, rollers running in the grooves, and a platen carriage, of screws connecting the carriage to the truck, and set screws cooperatirn with said connectim screws to level and secure the carriage am alinc the platen; said carriage being secured by said screws upon blocks which are fixed by screws to said truck.

JOHN C. MoLA UGlILlN.

Witnesses:

Jena (7. SEIFERT, Krr'rIE FRANKFORT. 

